Science and Certainty

Many people think that science, particularly the "hard" sciences like
physics, know whatever they know "for certain". To many people, a
fact is something that is absolutely correct
and unchanging.

You now know that both of these
statements are false - but that the uncertainty and change
inherent in scientific progress are actually a strength of
science. What else has changed our world as much in the last 400
years as science?

Most practicing scientists will tell you that science has made, and
continues to make real progress toward real understanding of nature -
that every change and adjustment ultimately brings us closer to the
"truth". (Not everyone agrees, however.)